CVE-2021-34716— Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability
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I. Basic Information for CVE-2021-34716
Vulnerability Information
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Vulnerability Title
Cisco Expressway Series and TelePresence Video Communication Server Remote Code Execution Vulnerability
Source: NVD (National Vulnerability Database)
Vulnerability Description
A vulnerability in the web-based management interface of Cisco Expressway Series and Cisco TelePresence Video Communication Server (VCS) could allow an authenticated, remote attacker to execute arbitrary code on the underlying operating system as the root user. This vulnerability is due to incorrect handling of certain crafted software images that are uploaded to the affected device. An attacker could exploit this vulnerability by authenticating to the system as an administrative user and then uploading specific crafted software images to the affected device. A successful exploit could allow the attacker to execute arbitrary code on the underlying operating system as the root user.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
抛出异常的清理不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
Cisco Expressway Series和Cisco TelePresence Video Communication Server 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco Expressway Series和Cisco TelePresence Video Communication Server（VCS）都是美国思科（Cisco）公司的产品。Cisco Expressway Series是一款用于防火墙外访问设备的软件。该软件为防火墙外的用户提供了简单、高度安全的访问功能，帮助远程办公人员在他们选择的设备上更有效地工作。Cisco TelePresence Video Communication Server是一款视频通信服务器。 Cisco Expressw
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Cisco | Cisco TelePresence Video Communication Server (VCS) Expressway | n/a | - |
II. Public POCs for CVE-2021-34716
| # | POC Description | Source Link | Shenlong Link |
|---|
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- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ewrce-QPynNCjhvendor-advisoryx_refsource_CISCO
- https://nvd.nist.gov/vuln/detail/CVE-2021-34716
Same Patch Batch · Cisco · 2021-08-18 · 7 CVEs total
| CVE-2021-34730 | 9.8 CRITICAL | Cisco Small Business RV110W, RV130, RV130W, and RV215W Routers Remote Command Execution an |
| CVE-2021-34745 | 7.8 HIGH | AppDynamics .NET Agent Privilege Escalation Vulnerability |
| CVE-2021-34734 | 6.5 MEDIUM | Cisco Video Surveillance 7000 Series IP Cameras Link Layer Discovery Protocol Double-Free |
| CVE-2021-34749 | 5.8 MEDIUM | Multiple Cisco Products Server Name Identification Data Exfiltration Vulnerability |
| CVE-2021-1561 | 5.4 MEDIUM | Cisco Secure Email and Web Manager Spam Quarantine Unauthorized Access Vulnerability |
| CVE-2021-34715 | 4.7 MEDIUM | Cisco Expressway Series and TelePresence Video Communication Server Image Verification Vu |
IV. Related Vulnerabilities
- CVE-2025-20179
Cisco Expressway Series Cross-Site Scripting Vulnerability - CVE-2022-20814
Cisco Expressway Series and Cisco TelePresence VCS Improper - CVE-2022-20853
Cisco Expressway Series and Cisco TelePresence VCS Cross-Sit - CVE-2024-20492
Cisco Expressway Series Privilege Escalation Vulnerability - CVE-2024-20497
Cisco Expressway Edge Improper Authorization Vulnerability
Same vendor: Cisco
- CVE-2026-20219
Cisco Slido 安全漏洞 - CVE-2026-20034
Cisco Unity Connection Remote Code Execution Vulnerability - CVE-2026-20035
Cisco Unity Connection Server-Side Request Forgery Vulnerabi - CVE-2026-20167
Cisco IoT Field Network Director Remote Device Denial of Ser - CVE-2026-20169
Cisco IoT Field Network Director Command Injection Vulnerabi
Same weakness: CWE-460
V. Comments for CVE-2021-34716
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